HD 165493

HD 165493
Observation data; Epoch J2000 Equinox J2000
Constellation	Ara
Right ascension	18h 08m 30.10807s
Declination	−45° 46′ 01.2534″
Apparent magnitude (V)	6.153 (6.15 + 9.55)
Characteristics
Spectral type	B7.5II
U−B color index	−0.49
B−V color index	−0.08
Astrometry
Radial velocity (Rv)	−35.0±4.3 km/s
Proper motion (μ)	RA: −2.88 mas/yr ; Dec.: −17.29 mas/yr
Parallax (π)	3.68±0.60 mas
Distance	approx. 900 ly ; (approx. 270 pc)
Absolute magnitude (MV)	−0.97
Details
HD 165493 A
Mass	4.2 M☉
Radius	5.4 R☉
Luminosity	521 L☉
Surface gravity (log g)	3,58 cgs
Temperature	12,849 K
Other designations
	CD−45 12215, HD 165493, HIP 88859, HR 6759, SAO 228734, WDS J18085-4546AB
Database references
SIMBAD	data
	B

HD 165493 is double star in the southern constellation of Ara. As of 2011, the two components have an angular separation of 4″ along a position angle of 257°.^[4]

References

^ ^a ^b Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters. 38 (5): 331. arXiv:1108.4971. Bibcode:2012AstL...38..331A. doi:10.1134/S1063773712050015. XHIP record for this object at VizieR.
^ ^a ^b ^c ^d ^e van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653–664. arXiv:0708.1752. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357. S2CID 18759600.
^ ^a ^b Hohle, M. M.; Neuhäuser, R.; Schutz, B. F. (2010). "Masses and luminosities of O- and B-type stars and red supergiants". Astronomische Nachrichten. 331 (4): 349. arXiv:1003.2335. Bibcode:2010AN....331..349H. doi:10.1002/asna.200911355. S2CID 111387483.
^ ^a ^b Mason, B. D.; et al. (2014), "The Washington Visual Double Star Catalog", The Astronomical Journal, 122 (6): 3466, Bibcode:2001AJ....122.3466M, doi:10.1086/323920, retrieved 2015-07-22
^ ^a ^b Nicolet, B. (1978), "Photoelectric photometric Catalogue of homogeneous measurements in the UBV System", Astronomy and Astrophysics Supplement Series, 34: 1–49, Bibcode:1978A&AS...34....1N
^ Gontcharov, G. A. (November 2006). "Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system". Astronomy Letters. 32 (11): 759–771. arXiv:1606.08053. Bibcode:2006AstL...32..759G. doi:10.1134/S1063773706110065. S2CID 119231169.
^ ^a ^b ^c ^d ^e Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv:2208.00211. Bibcode:2023A&A...674A...1G. doi:10.1051/0004-6361/202243940. S2CID 244398875. Gaia DR3 record for this source at VizieR.

External links

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[xhip-1] Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters. 38 (5): 331. arXiv:1108.4971. Bibcode:2012AstL...38..331A. doi:10.1134/S1063773712050015. XHIP record for this object at VizieR.

[van_Leeuwen2007-2] van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653–664. arXiv:0708.1752. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357. S2CID 18759600.

[hohle-3] Hohle, M. M.; Neuhäuser, R.; Schutz, B. F. (2010). "Masses and luminosities of O- and B-type stars and red supergiants". Astronomische Nachrichten. 331 (4): 349. arXiv:1003.2335. Bibcode:2010AN....331..349H. doi:10.1002/asna.200911355. S2CID 111387483.

[WDSC2014-4] Mason, B. D.; et al. (2014), "The Washington Visual Double Star Catalog", The Astronomical Journal, 122 (6): 3466, Bibcode:2001AJ....122.3466M, doi:10.1086/323920, retrieved 2015-07-22

[aass34_1-5] Nicolet, B. (1978), "Photoelectric photometric Catalogue of homogeneous measurements in the UBV System", Astronomy and Astrophysics Supplement Series, 34: 1–49, Bibcode:1978A&AS...34....1N

[Gontcharov-6] Gontcharov, G. A. (November 2006). "Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system". Astronomy Letters. 32 (11): 759–771. arXiv:1606.08053. Bibcode:2006AstL...32..759G. doi:10.1134/S1063773706110065. S2CID 119231169.

[dr3a-7] Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv:2208.00211. Bibcode:2023A&A...674A...1G. doi:10.1051/0004-6361/202243940. S2CID 244398875. Gaia DR3 record for this source at VizieR.

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Observation data Epoch J2000 Equinox J2000
Constellation	Ara^[1]
Right ascension	18^h 08^m 30.10807^s^[2]
Declination	−45° 46′ 01.2534″^[2]
Apparent magnitude (V)	6.153^[3] (6.15 + 9.55)^[4]
Characteristics
Spectral type	B7.5II^[3]
U−B color index	−0.49^[5]
B−V color index	−0.08^[5]
Astrometry

Radial velocity (R_v)	−35.0±4.3^[6] km/s
Proper motion (μ)	RA: −2.88^[2] mas/yr Dec.: −17.29^[2] mas/yr
Parallax (π)	3.68±0.60 mas^[2]
Distance	approx. 900 ly (approx. 270 pc)
Absolute magnitude (M_V)	−0.97^[1]

Details
HD 165493 A
Mass	4.2^[7] `M`_☉
Radius	5.4^[7] `R`_☉
Luminosity	521^[7] `L`_☉
Surface gravity (log g)	3,58^[7] cgs
Temperature	12,849^[7] K

Other designations
CD−45 12215, HD 165493, HIP 88859, HR 6759, SAO 228734, WDS J18085-4546AB
Database references
SIMBAD	data
	B